Identification, vectoring & termination of surveillance service
Identification (RAC 1.5.2): ATC identifies the aircraft before offering the service, by:
- Position report
- Identifying turn
- Transponder
Phrases (RAC 1.5.2):
| Pilot is told | Means |
|---|---|
| IDENTIFIED | Identification established |
| IDENTIFICATION LOST | Identification lost |
| RESUME NORMAL NAVIGATION | One vector ended; fly own navigation |
| ATS SURVEILLANCE SERVICE TERMINATED | Whole service ended |
- Identification does not relieve pilot of collision avoidance or terrain/obstacle clearance (RAC 1.5.2).
- Observed-target information to identified IFR/CVFR flights is additional only; pilot keeps lookout and clearance duties.
ATC vectors (assigns headings) for:
- Separation from other traffic
- Noise abatement procedures
- Pilot's request
- Operational advantage to pilot or controller
Vector rules:
- Pilot told where vector takes the aircraft (RAC 1.5.3).
- Fly heading directly off compass or heading indicator, no calculating (TP 1102, Radio Communication: Vectors).
Vector end (RAC 1.5.2):
- Normally: "RESUME NORMAL NAVIGATION."
- Exception: vectored to final approach course or traffic circuit. No separate call; approach clearance means normal navigation resumed.
Minimum vectoring altitudes (RAC 1.5.5(a)):
- Set at some locations.
- Lowest altitude ATC may vector at meeting obstacle clearance criteria.
- May be lower than minimum altitudes on navigation and approach charts.
Obstacle/terrain clearance while vectored:
| Flight | Responsible for clearance | Until | Ref |
|---|---|---|---|
| En route IFR/CVFR | ATC | Aircraft resumes normal navigation | RAC 1.5.2 |
| IFR vectored for arrival | ATC | Aircraft resumes normal navigation | RAC 1.5.2 |
| VFR | Pilot; also avoids other traffic | Always, even while vectored | RAC 1.5.4, 1.5.5(b) |
ATS surveillance service normally continues until the aircraft:
- Leaves surveillance coverage area
- Enters uncontrolled airspace
- Is transferred to a unit not equipped with ATS surveillance
Pilot then told "ATS SURVEILLANCE SERVICE TERMINATED" (RAC 1.5.2). Class C: pilot informed when it terminates, except when transferred to a tower (RAC 5.8(b)(vii)).
Trap: "RESUME NORMAL NAVIGATION" ends one vector, not the service; identified or vectored does not hand terrain clearance to ATC (only en route IFR/CVFR and IFR arrivals; VFR pilot always keeps it).
References
- TC AIM RAC 1.5.2
- TC AIM RAC 1.5.3
- TC AIM RAC 1.5.5
- TC AIM RAC 5.8
- TP 1102, Radio Communication: Vectors